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blktrace: fix unlocked access to init/start-stop/teardown
authorJens Axboe <axboe@kernel.dk>
Sun, 5 Nov 2017 16:13:48 +0000 (09:13 -0700)
committerJens Axboe <axboe@kernel.dk>
Sat, 11 Nov 2017 02:53:25 +0000 (19:53 -0700)
commit1f2cac107c591c24b60b115d6050adc213d10fc0
tree958d22ca65748177f3d3de85af6ef468fe5826c7tree
parentbf9fc98b736b8a3837040d5ce3a7caf04fa0859ccommit | diff
blktrace: fix unlocked access to init/start-stop/teardown

sg.c calls into the blktrace functions without holding the proper queue
mutex for doing setup, start/stop, or teardown.

Add internal unlocked variants, and export the ones that do the proper
locking.

Fixes: 6da127ad0918 ("blktrace: Add blktrace ioctls to SCSI generic devices")
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
kernel/trace/blktrace.c diff | blob | blame | history
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